Command line options

-d NNN--debug-code=NNN

Set the debugging code to NNN. NNN is an integer, currently between 0 and 31
(inclusive). This would probably be better named "verbose-code", as
it allows you to turn on and off the verboseness of different program sections.

You can decide which sections you want to be verbose by adding only those numbers, and
giving the sum to --debug-code. The default value is 1.

-f filename--file=filename

Read in the regular expression from the file filename. The regular expression
should be given on one line in the file, with or without an ending
carriage return (ASCII 10). If the special filename - is given,
regldg will finish parsing the command line arguments and then wait for you
to enter the regular expression. This wait will occur without a prompt, so
that expected output isn't altered.

-m NNN--max-length=NNN

Set the maximum length of the "words" output to NNN. NNN is an
integer, currently 0 or more. If your regular expression has open-ended
quantifiers like *, +, or {3,}, you'll want to keep
the maximum length of the words output in check. Otherwise, there'll be
no problems setting it very high.

-n NNN--num-words-output=NNN

Limit the number of words output to NNN. NNN is an integer. Negative
values mean no limit. The default is -1.

-p--parse-only

Tells regldg to parse the regular expression verbosely, then quit.

-r--readable-output

Replace any "non-printable" character (as defined by isprint()
in the ctype.h library, man isprint) with it's ASCII decimal
equivalent surrounded by { and }. This will allow you to
use non-printable characters in your regular expressions, and see what will
happen in the output. You can avoid things like printing system bells,
unintended newline characters, backspaces, and any other non-printable character.

-uc NNN--universe-checking=NNN

Set the character universe checking code to NNN. NNN is an integer, currently
between 0 and 3 (inclusive). Following are descriptions of the character universe
checking options:

1 = Prevent characters which are not in the character universe to be included when
explicitly stated. Without this, you are allowed to use "foreign" characters
in your regular expression without modifying the character universe.
2 = Prevent character and meta-character classes from being intersected with
the current character universe. Without this, . would
represent ASCII characters 0-255, instead of only those in the current character
universe.

You can combine the character universe checking codes by adding their
numbers, and giving the sum to --universe-checking. The default value
is 3 (strict character universe checking).

-us NNN--universe-set=NNN

Set the character universe to pre-defined set NNN. NNN is an integer, currently
between 0 and 255 (inclusive). Following are descriptions of the pre-defined
universe sets:

You can combine the universe sets by adding their numbers, and
giving the sum to --universe-set. The default value is 7. This
will override any previous -u or -us arguments.

-u [UNIVERSE]--universe=[UNIVERSE]

Explicitly specify the character universe as a character class. This will
override any previous -u or -us arguments. Note: this
does not take into account any previously defined universe or universe set.
Any meta-characters specified here will be fully included - . will
include all ASCII characters 0-255.
Negated character classes (those with ^ as the first character) will
be calculated from the full set of ASCII characters 0-255.